<template>
  <div class="editor" ref="editor" :style="styles"></div>
</template>

<script>
  import Quill from 'quill'
  import 'quill/dist/quill.core.css'
  import 'quill/dist/quill.snow.css'
  import 'quill/dist/quill.bubble.css'

  export default {
    name: 'Editor',
    props: {
      /* 编辑器的内容 */
      value: {
        type: String,
        default: ''
      },
      /* 高度 */
      height: {
        type: Number,
        default: null
      },
      /* 最小高度 */
      minHeight: {
        type: Number,
        default: null
      },
      placeholder: {
        type: String,
        default: '请输入内容'
      },
      /* 只读 */
      readOnly: {
        type: Boolean,
        default: false
      }
    },
    data() {
      return {
        Quill: null,
        currentValue: '',
        options: {
          theme: 'snow',
          bounds: document.body,
          debug: 'warn',
          modules: {
            // 工具栏配置
            toolbar: [
              ['bold', 'italic', 'underline', 'strike'], // 加粗 斜体 下划线 删除线
              ['blockquote', 'code-block'], // 引用 代码块
              [{ list: 'ordered' }, { list: 'bullet' }], // 有序、无序列表
              [{ indent: '-1' }, { indent: '+1' }], // 缩进
              [{ size: ['small', false, 'large', 'huge'] }], // 字体大小
              [{ header: [1, 2, 3, 4, 5, 6, false] }], // 标题
              [{ color: [] }, { background: [] }], // 字体颜色、字体背景颜色
              [{ align: [] }], // 对齐方式
              ['clean'], // 清除文本格式
              ['link', 'image', 'video'] // 链接、图片、视频
            ]
          },
          placeholder: this.placeholder,
          readOnly: this.readOnly
        }
      }
    },
    computed: {
      styles() {
        const style = {}
        if (this.minHeight) {
          style.minHeight = `${this.minHeight}px`
        }
        if (this.height) {
          style.height = `${this.height}px`
        }
        return style
      }
    },
    watch: {
      value: {
        handler(val) {
          if (val !== this.currentValue) {
            this.currentValue = val === null ? '' : val
            if (this.Quill) {
              this.Quill.pasteHTML(this.currentValue)
            }
          }
        },
        immediate: true
      }
    },
    mounted() {
      this.init()
    },
    beforeDestroy() {
      this.Quill = null
    },
    methods: {
      init() {
        const editor = this.$refs.editor
        this.Quill = new Quill(editor, this.options)
        // 如果设置了上传地址则自定义图片上传事件
        if (this.uploadUrl) {
          const toolbar = this.Quill.getModule('toolbar')
          toolbar.addHandler('image', (value) => {
            if (value) {
              this.$refs.upload.$children[0].$refs.input.click()
            } else {
              this.quill.format('image', false)
            }
          })
          toolbar.addHandler('video', (value) => {
            if (value) {
              this.$refs.upload.$children[0].$refs.input.click()
            } else {
              this.quill.format('video', false)
            }
          })
        }
        this.Quill.pasteHTML(this.currentValue)
        this.Quill.on('text-change', (delta, oldDelta, source) => {
          const html = this.$refs.editor.children[0].innerHTML
          const text = this.Quill.getText()
          const quill = this.Quill
          this.currentValue = html
          this.$emit('input', html)
          this.$emit('on-change', { html, text, quill })
        })
        this.Quill.on('text-change', (delta, oldDelta, source) => {
          this.$emit('on-text-change', delta, oldDelta, source)
        })
        this.Quill.on('selection-change', (range, oldRange, source) => {
          this.$emit('on-selection-change', range, oldRange, source)
        })
        this.Quill.on('editor-change', (eventName, ...args) => {
          this.$emit('on-editor-change', eventName, ...args)
        })
      }
    }
  }
</script>

<style>
  .editor, .ql-toolbar {
    white-space: pre-wrap !important;
    line-height: normal !important;
  }

  .quill-img {
    display: none;
  }

  .ql-snow .ql-tooltip[data-mode="link"]::before {
    content: "请输入链接地址:";
  }

  .ql-snow .ql-tooltip.ql-editing a.ql-action::after {
    border-right: 0px;
    content: "保存";
    padding-right: 0px;
  }

  .ql-snow .ql-tooltip[data-mode="video"]::before {
    content: "请输入视频地址:";
  }

  .ql-snow .ql-picker.ql-size .ql-picker-label::before,
  .ql-snow .ql-picker.ql-size .ql-picker-item::before {
    content: "14px";
  }

  .ql-snow .ql-picker.ql-size .ql-picker-label[data-value="small"]::before,
  .ql-snow .ql-picker.ql-size .ql-picker-item[data-value="small"]::before {
    content: "10px";
  }

  .ql-snow .ql-picker.ql-size .ql-picker-label[data-value="large"]::before,
  .ql-snow .ql-picker.ql-size .ql-picker-item[data-value="large"]::before {
    content: "18px";
  }

  .ql-snow .ql-picker.ql-size .ql-picker-label[data-value="huge"]::before,
  .ql-snow .ql-picker.ql-size .ql-picker-item[data-value="huge"]::before {
    content: "32px";
  }

  .ql-snow .ql-picker.ql-header .ql-picker-label::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item::before {
    content: "文本";
  }

  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="1"]::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="1"]::before {
    content: "标题1";
  }

  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="2"]::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="2"]::before {
    content: "标题2";
  }

  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="3"]::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="3"]::before {
    content: "标题3";
  }

  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="4"]::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="4"]::before {
    content: "标题4";
  }

  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="5"]::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="5"]::before {
    content: "标题5";
  }

  .ql-snow .ql-picker.ql-header .ql-picker-label[data-value="6"]::before,
  .ql-snow .ql-picker.ql-header .ql-picker-item[data-value="6"]::before {
    content: "标题6";
  }

  .ql-snow .ql-picker.ql-font .ql-picker-label::before,
  .ql-snow .ql-picker.ql-font .ql-picker-item::before {
    content: "标准字体";
  }

  .ql-snow .ql-picker.ql-font .ql-picker-label[data-value="serif"]::before,
  .ql-snow .ql-picker.ql-font .ql-picker-item[data-value="serif"]::before {
    content: "衬线字体";
  }

  .ql-snow .ql-picker.ql-font .ql-picker-label[data-value="monospace"]::before,
  .ql-snow .ql-picker.ql-font .ql-picker-item[data-value="monospace"]::before {
    content: "等宽字体";
  }
</style>
